Unit-II Final Drive: Types of reductions, Structure and function suspensions like hydraulic suspension; brakes and steering:- hydraulic power steering, main components and circuit; tire, brakes and components and functions; Under carriage and tracked vehicles, advantages and disadvantages, tractor and components.

Unit-III Earth Moving Equipments Management:: Earth moving equipments; maintenance; type of maintenance schedules; purpose and advantages, organization set ups and documentation; method of selection of equipments:-Selection of machines, basic rules of matching machine, selection of equipment including the nature of operation; selection- based on type of soil, based on haul distance and weather condition